在生产中发现3 10mm规格以上 7A0 9锻件用铸锭出现了羽毛状晶 ,成为不合格锻坯 ,研究了羽毛状晶产生的原因 ,并采取相应防治措施 ,消除了羽毛状晶缺陷 ,最终获得合格铸锭
The feather-like crystal that lead to unqualified ingot was found in 7A09 alloy ingot for forging in specification of more than 310 mm. The reason for feather-like crystal formation was studied and corre sponding preventive measures were adopted to have eliminated the defects of feat her-like crystal. Finally, the qualified ingot was obtained.
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